New Compression/Ejection Cooling Technology And Its Application

With the improvement of people’s living standard, refrigerators, air conditioners, water chillers and heat compression refrigeration equipments such wide use. Meanwhile, a large number of using steam compression of refrigeration equipments rise in energy consumption, thus aggravate rigid system load, and increased pollution to the environment. Therefore, to improve the system efficiency of compression refrigeration equipments, optimize the system design, reduce cost, which have become compression refrigeration circulation system development direction.In the vapor compression refrigeration system, After the refrigerant leaving the condenser, All to evaporate through the throttle reduce pressure into the evaporator absorb heat and refrigeration. And throttling process is strong irreversible process, which could be transformed into mechanical energy dissipation of the pressure potential energy into heat to be completely absorbed by refrigerant, and mechanical energy and cooling capacity caused by the double loss. And the refrigerant flow through the throttle usually occurs flash gas, flash gas in the evaporator does not absorb heat, but this part of the gas is inhaled air compressor, which can consume energy, thus reducing the efficiency of the system. This thesis, gas-liquid jet pump is proposed to replace the throttle for study, The main contents of the study are as follows:(1) Put forward a new compression/ejection refrigeration system, the principle of this system are introduced, with the laws of thermodynamics analysis system performance, and then compared with the traditional steam compressing refrigeration system, found that the cooling coefficient and exergy efficiency of new cycle were increased.(2) On the new compression/ejection refrigeration system of the key components—the liquid jet pump work process is analyzed, the mathematical and physical model are established. analyses the structure parameters and the refrigerant state parameters on the performance of gas and liquid jet pump. Gas and liquid jet pump is established design calculation program diagram.(3) On the new compression/ejection refrigeration system component parameters of mutual coupling relationship are analyzed, and the new compression/spray cooling technology applied in water screw water chillers, which provides design case.